Clear old branches from local and remote repos

clean_local.sh

# Delete all merged local branches except for master
git branch --merged master | grep -v master | xargs git branch -d

clean_remote.sh

#Delete all remote branches on origin except master
git branch -r | grep origin/ | grep -v master |  awk -F'origin/' '{ print $2 }' | xargs -I {} git push origin :{}

Ref:

• http://stackoverflow.com/questions/10555136/delete-multiple-remote-branches-in-git
• http://stackoverflow.com/questions/10610327/delete-all-local-git-branches